753 prompts matching "Choosing a sample, and what makes it fair"
Exam timing: A timed set of enlargement questions
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Worked example: Multiplying a 2 by 3 matrix by a 3 by 2 matrix
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Practice set: Multiplying a matrix by a scalar
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Exam timing: A timed set of matrix operations
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Practice set: Finding the inverse of a given 2 by 2 matrix
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Worked example: Solving a 2 by 2 system by the matrix method
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Practice set: Cramer's rule as an alternative method
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Real-life Nigeria: Recognising a system that has no unique solution
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Exam timing: A timed set of matrix-method simultaneous equations
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Practice set: Finding the roots from where the curve cuts the x-axis
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Real-life Nigeria: Reading the maximum or minimum value off the graph
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Exam timing: A timed set of quadratic graph questions
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Worked example: Solving a quadratic graphically by adding a straight line
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Practice set: Solving simultaneous equations graphically
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Real-life Nigeria: Where a graphical method beats an algebraic one
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Exam timing: A timed set of graphical solution questions
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Worked example: Testing the vertices of the feasible region
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Practice set: Finding the maximum of an objective function
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Real-life Nigeria: A production mix problem for a small business
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Exam timing: A timed set of linear programming questions
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